Composer & AI

Publish to Instagram

Schedule Instagram posts, Reels and Stories, plus the tagging, collaborator and cover controls that only appear once you pick a format.

Updated · 4 min read

Posts, Reels and Stories, with tagging and the Reel cover controls.

Instagram is the one network that will never accept a text-only post — every post needs at least one photo or video. Attach the media first and the rest of the composer unlocks around it.

Pick the format first

Post, Reel or Story. This is the first choice to make, not the last: the controls underneath change with it, and a couple of them exist for one format only.

The Instagram composer with the Post, Reel and Story format tabs highlighted.
  1. 1
    Post

    A feed post. One photo, or up to 10 photos as a carousel. Adding a video switches the post to a Reel, because PostDaily publishes Instagram videos as Reels.

  2. 2
    Reel

    A vertical video with its own cover and audio controls — see below.

  3. 3
    Story

    Disappears after 24 hours. Several images publish as separate frames, one after another.

Caption, alt text and the first comment

The composer showing the ALT badge on the thumbnail, the Add comment button and the AI-Generated toggle.
  • 2,200 characters for the caption. The counter beside the editor counts down.
  • ALT on each thumbnail adds a description for people using a screen reader. Instagram shows it nowhere visible, which is exactly why it gets skipped — write it anyway.
  • Add comment posts a comment on your own post the moment it publishes. This is where hashtags belong if you'd rather keep the caption clean.
  • AI-Generated labels the post as AI-made. Instagram asks for this when it applies, and applying it yourself is better than having Instagram apply it for you.

Tagging people, collaborators and products

On a Post, each thumbnail carries a tag button. It opens three tabs.

The Instagram tag dialog with the People, Collaborators and Products tabs highlighted.
For people tags, tap the photo where the tag should sit, then type the username.
  1. 4
    People

    Tags pinned to a spot on the image. Tap the photo first, then type the username — the tag goes where you tapped.

  2. 5
    Collaborators

    Invites up to three accounts to co-author the post, so it appears on their profile too. They have to be public, have collaborator invites turned on, and accept.

  3. 6
    Products

    Not available yet. Tagging products needs an Instagram Shop catalog, which PostDaily doesn't support so far.

Reel options

Choosing Reel replaces the panel with controls that only make sense for video.

The Reel panel showing Also share to feed, the cover frame scrubber, Custom cover image and Rename original audio.
  1. 7
    Also share to feed

    On by default. Leave it on and the Reel appears on your profile grid as well as in the Reels tab.

  2. 8
    Cover frame

    Drag to pick the thumbnail from the video itself. The live preview updates as you scrub, so you can see what you're choosing. Or use Custom cover image to upload one instead.

  3. 9
    Rename original audio

    Names the audio track. People who tap it see this name, and can use the sound in their own Reels.

If a post won't go out

  • "Instagram posts require at least one photo or video" — the composer is telling you the truth. Instagram has no text-only post.
  • More than 10 photos — a carousel tops out at 10. Split the rest into a second post.
  • Personal account — Instagram only allows scheduled publishing to Business and Creator accounts. Converting is free in the Instagram app.
  • A Story that partly published — Instagram treats every frame as its own post against a daily cap, so a long Story can hit the limit midway. The post records which frames made it.
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